diff --git a/2-Exploratory-Data-Analysis.ipynb b/2-Exploratory-Data-Analysis.ipynb
index 51c9d5c..18ae583 100644
--- a/2-Exploratory-Data-Analysis.ipynb
+++ b/2-Exploratory-Data-Analysis.ipynb
@@ -247,7 +247,7 @@
     "# Identify the non-zero items in the document-term matrix, meaning that the word occurs at least once\n",
     "unique_list = []\n",
     "for comedian in data.columns:\n",
-    "    uniques = data[comedian].nonzero()[0].size\n",
+    "    uniques = data[comedian].to_numpy().nonzero()[0].size\n",
     "    unique_list.append(uniques)\n",
     "\n",
     "# Create a new dataframe that contains this unique word count\n",